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AJAX上传文件后，文件怎样与业务数据关联... #250
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表单中除了需要填写业务数据，还需要上传一张封面图片。表单对应业务记录的 ID 是存入数据库时生成的。我现在是这样做的，AJAX上传封面图片，返回一个文件ID，然后将其赋给表单中一个 hidden input，提交表单后，将业务数据和封面图片ID保存。
感觉没必要多搞一个 hidden input 出来。。。有没有更好的法子?
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